Friday, May 23rd, 2008 AT 10:25 PM
1996 Honda Accord LX 153k. I had a diagnostic check since my check engine light came on. It registered oxygen sensor was bad. Went to order part, they asked upstream or downstream? Sorry, cars are not my specialty. Where is the oxygen sensor located & is this something I can change fairly easy? Also, online the part runs around $70. Auto store sells for $140. Why the huge difference? Any help would be more than appreciated. Thanks.

